<!DOCTYPE html>
<html>
<head>
  <title>URL Level Capture</title>
  <style>
    body {
      width: 300px;
      padding: 10px;
      font-family: Arial, sans-serif;
    }
    .level {
      margin: 5px 0;
      word-wrap: break-word;
    }
  </style>
</head>
<body>
  <h1>URL Levels</h1>
  <div id="levels"></div>
  <script src="popup.js"></script>
</body>
</html>
